. >> protection of his life can we prove that by a court of law? no. there are other remedies. >> coming up... >> they have come over assumed the identities of the dead americans. >> seemed to be a nice family. >> really shows you how farther >> traditional espionage. >> hundreds of cyber attacks. >> it is a direct threat. >> it is the easiest way to find out who be trade. >> fox files goes inside espionage in the cold war. they raised members. >> russia continues to send spies to the u.s. >> you are covered sue he kret agents for the russian government. >> it is a story out of the cold war. a nest of spies spread across america from the big cities to the quiet suburbs. june 2010, the fbi and the department of justice revealed operation ghost stories. the arrest of a network of russian spies living and working in america. some were sleeper agents with deep covers hiding behind fake american identities. in the word of the clan desloratadine services they are called illegals. >> they are a part of the soviet system since the creation of the kgp. >> they